You can be sure of the Lord's promise. Just as He prophesied that Jesus would be born and suffer for our sins on the cross. He has also told us that he will return, John 14:3 tells us "and if I go to prepare a place for you, I will come again". This is a hope to those who are watching and ready and a warning to those who are not. It is a promise either way and "it is impossible for God to lie" Heb 6:18. So trust in the Lord Jesus today for your salvation and your hope. God bless you today!